From the following, which statement is INCORRECT concerning hydrogen chloride gas?
A. It is lighter than air.
B. It is soluble in water.
C. It has a pungent smell.
D. It reacts with ammonia forming ammonium chloride.
E. It has a boiling point of 188 K.
Hydrogen chloride gas is extremely soluble in water, has a pungent smell, has a boiling point of 188 K, and reacts with ammonia to form white fumes of ammonium chloride. It is not lighter than air. The density of the gas is about 25% heavier than air.